yeah the major one would be the science teacher's story, I think they could have expanded on that for sure, but maybe leaving it vague was creative design idk. there's also the whole assemblywoman story and the bullied girl which also left us wondering quite a bit
honestly, this show wasn't half bad for someone who doesn't usually watch shows of this genre but there were a bunch of plot holes that weren't really addressed and I know a season 2 could fill those holes but it would be stretching the show way too much imo